ALPES C113 vs C116 Casement Windows: Which Fits Your Project?

Choosing between ALPES C113 and C116 outward-opening windows starts with the frame section, sash dimensions and opening layout. Both models list 6060-T66 aluminum profiles and PA66GF25 insulation strips. Their published sash and mullion dimensions differ, so the useful next step is to compare section drawings against your project requirements.

C113 vs C116: what do the product specifications show?

The C113 aluminum casement window is an outward-opening model whose specification table lists a 113 mm frame width. The C116 aluminum casement window also opens outward and lists a 116 mm frame wall width. Because the frame labels differ, ask for section drawings before treating the two measurements as directly interchangeable.

Source: the two ALPES product pages linked above. Paired mullion measurements retain the website's notation; their orientation and application should be confirmed on the proposed section. Final order details belong in the approved drawings and quotation.

How should these differences guide your selection?

Start with the wall opening and frame detail

Give ALPES the opening width and height, wall build-up and intended finished surfaces. Label each dimension as a rough opening or a finished opening. Request a section showing how the proposed frame meets the wall, sill and surrounding finishes. The published 113 mm and 116 mm frame measurements alone cannot tell you whether either system fits an existing reveal.

Compare the visible frame using the same window layout

For a living room or villa elevation, request drawings of both models using identical overall dimensions and the same fixed and opening sections. This makes the comparison useful: you can review the proposed glass area, mullion positions and handle placement together. A single number taken from the mullion specification does not describe every visible edge of an assembled window.

Specify the glazing separately from the sash

The 57 mm and 81 mm values are labeled Glass Sash Thickness. They are not specifications for a 57 mm or 81 mm glass unit. Ask for the proposed glazing build-up, total unit thickness and compatibility with the selected sash. If daylight, privacy or room comfort is a priority, describe that requirement so the glass proposal addresses it explicitly.

What else should you compare before requesting a price?

Use the same project brief for both models. Otherwise, a price difference may reflect different glazing, hardware, finishes or included services.

• Opening layout: Mark fixed sections, opening sashes and hinge sides. State whether the drawing is viewed from indoors or outdoors, and show nearby features that could interfere with an outward-opening sash.
• Hardware and operation: Request the proposed handle, hinge and locking configuration, together with confirmation that it suits the quoted sash dimensions and glazing weight.
• Screen arrangement: Ask which mesh and screen configuration are included, how the screen operates and how it can be accessed for cleaning. Compare the actual quoted options.
• Finish: Provide the desired color and ask for a sample reference. Both product pages describe color choices and custom color matching, but the order should identify the agreed finish.
• Performance evidence: Where your project specifies thermal, acoustic, air or water performance, request documentation for the proposed configuration and have your project team review its applicability.

A practical brief for comparing C113 and C116 quotations

Organize the enquiry by opening ID so each quotation can be checked against the same schedule. For example, identify a living-room opening as W01, attach its dimensions and elevation, and ask ALPES to propose both models with the same glazing brief and finish.

1. List the project location, building use and whether the work is a replacement or a new installation.
2. Attach the opening schedule, quantities, photos or drawings, and the measurement convention used.
3. Record opening direction, screen preference, glass requirements and preferred color for each opening type.
4. Ask the quotation to identify the model, glazing, hardware, accessories, exclusions and delivery scope.
5. Request unresolved dimensions and configuration choices to be marked for approval before production.

Frequently asked questions

Is C116 automatically better because its sash is thicker?

No. The larger published sash dimension describes a section difference. Choosing a model still requires the proposed glazing, hardware, opening size, frame detail and relevant performance evidence.

Can I rank their insulation from the product pages alone?

The published specifications do not provide a like-for-like thermal comparison. Request results with the units, test basis, specimen dimensions and glazing configuration stated before using them to ｓｅｌｅｃｔ a window.

Can both models be considered for a villa?

Both can be included in a villa project enquiry where outward opening is desired. Suitability depends on the individual openings and the configuration ALPES proposes. Send the elevation and opening schedule rather than selecting solely by building type.

Which model should I request a quotation for first?

If no frame section has been selected, request both against one brief. If your designer has already defined the frame or sash detail, send that drawing first and ask which model can meet it. This gives the comparison a clear basis.